Device for aiding the hearing.



B. W. SCHNEIDER. DEVICE FOR AIDING THE HEARING.

AIPLIOATION FILED MAY 18. 190a.

1,040,428. I Patented 0ct.-8, 191 2.

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mam nun m ummusmown u r and battery properly connected or assembled.-

.ing the" hearin UNITED strAtrEs PATENT OFFICE.

EUGEiNE w. SCHNEIDER, .01" NEW YORK, N. 'Y., ASSIGNOR TO THE MEARS EAR.PI-IONE COMPANY, OF NEW YORK, N."Y.', A CORPORATION OF NEW YORK.

DEV-Ion FOR AIDING THE, HEARING.

Speeiflcat ion'of Letters Patent.

Patented Oct. 8, 1912.

Application filedlllay 18, 1903 Serial No. 433,402.

ful Improvements in Devices for Aiding the Hearing, ofwhich the following is'a specification- My invention relates to apparatus for aidoperating on the telephone principle, and pertains more particularly to tha conne'ctions of thebattery with the transmit-ting devices. I I

The chief object of the invention is. to provide improved connecting devices for the purpose, which will permit of the battery being instantly and easily connected or disconnected at will. A fresh battery can thus be substituted for an exhausted battery with the greatest ease byeven an unskilled person; while the ease with which the si1bstitu-' tion can be effected materially simplifies the yse of theapparatus and makes a users lack of skilkor knowledge less liable to resultin derangement or imperfect operation of the apparatus. I p I The preferred form of the invention is illustrated in the annexed drawing, in which- Figure 1 is a front view or the transmitter Fig. 2 is a.rear view of the same, partly in action; Fig.3 is a frontview of the trans- .nitter" with the cover and diaphragm rev a 'VBI'tlCill cross section moved. Fig. 4 is of the transmitter. F ig. 5 is an unde plan view of the battery. cap.

The battery, designated by 1, is preferably of the dry type and is bypreference cylindrical in 'fbrm. The outer casing 2 is of zihc, and forms the negative element. It may be covered with an ornamental and protective covering 3 of paper or other materla-l. The positive element of the cell is electrically connected to a-nietallic button or disk 4. mounted in insulating material 1n the top of the casing 2. v

Tightly fitting the zinc casing at the top thereof is a. threaded metal sleeve or ring 5, adapted torecelve a cap 6" consisting of an insulating top or disk? and a dependmg internally threaded metal flange or ring 8. At one side of 'the cap is a terminal consisting of a tapering metal post 'havlng a rounded head. This terminal has a threadv bears firmly on the button or the cap Qjs screwed in place. -It will thereed shank extending through the disk or top 7 of the capand through an inwardly ex tending lip 10 on the ring 8, 'to which lip. the threaded shank iselcctrically connected by means of the small nut which serves to taster the post in'po sit-ion. 'At the opposite side of the cap is another,terminal post, of the same type, designated-by 11. the shank of which screws into a short strip of metal 12 on the underside of the disk.7. Extending tl nough the strip 12 and. disk 7 at the centerof the latter is a. short bolt 13, held in placeby a cap-nut 14. The bolt 13 disk 4 when fore be seen thatthe terminal 11 is in electrical connection with the positive pole of the battery and terminal 9 with the'negative pole.

Onthe solidmetallic back of the transmitter 16 are two strips of metal 17 '18, fastened thereto by screws as shown,' while between the said strips are two, insulated binding devices 19, 20, each consisting of a.

short bolt with a wide flat. head, held inv place by a flat nat on the inner side of the transmitter-back. The device 19 isat the center of the transmitter back and carries at its inner end the carbon electrode or cup 21 containing the usual carbonpellets in contact with the diaphragm' QZ. The other binding device, 20, is electrically connected bv a metal strip 23 to the member 18, which latter is insulated from the back of the transmitter. as shown. Both binding devices are insulated from the transmitter casing as shown, both carrybin'ding screws 24 for securing the conductors'25 of the'receiver (not In order to relieve the conductors shown). of as much strain as possible at the binding screws and prevent-raveling of. the outer wrapping where the conductors branch, the cord is clamped -or-bound firmly upon one of the transmitter terminal strips by means of a cleat or clip 27 fastened to the clip by screws. as shown.

\Vith the c'np 28, which holds the diaphragm in place, tightly screwed. up so as to bring the diaphragm into'close,contact with the casing, andthe inner nuts on the binding devices firmly set up, it will be found that the transmitter is hermetically sealed. Moisture, dust. and'other foreign matter are thus effectually excluded. At the same time the. connecti ns of the receiver over the heads and thus be held firmly but plate 12, terminal post 11, transmitter termiwill be seen that the device permits easy and .battery is provided'with terminal posts, by

' strain on the receiver. cord at thepoints the transmitter the terminals thereof will 'ing transmitter terminal are made slightly ing device 19, cup 21, diaphragm 22, transbattery-casing 2. 35

sightly by-aeason of wear, a new cord can be yieldingly on the posts. To disengage the parts it is'only necessary to give'a firm pull on the transmitter, as will be readily understood. In order toinsure that in replacing always be connected to the same battery terminals, one of the latter and the correspond larger than the others, as shown in Fig. 2.

The circuit from the battery and back to the battery can now be readily traced. Beginning at the disk or button 4, the course of the current is through the bolt 13, metal nal 3018, strip 23, binding device 20, through one of the conductors 25 to the receiver and back through the other to bindmitter-back 15, transmitter terminal 17-29, battery terminal 9, and ring 8 to the zinc From the foregoing description of the preferred embodiment of the invention 1t quick substitution of a fresh battery for an exhausted battery, either by screwing the newbattery into the cap 6, or, if the new inserting them into the transmitter terminals. Either operation can be performed with ease and certainty-by any user, of the device, no matter how great may be his lack of knowledge or skill in the manipulation of electrical devices. There is practically no where its conductors are connected ,to the transmitter, so that liability of 'the conductors being broken thereat, or of the electrical connection being' impaired, is practically eliminated. If-the cord should. become unsubstituted with but slight trouble by removing the clip or cleat 28 and loosening the binding screws27. Moreoven'the device "issimple and the construction is such that it may be made strong enough to withstand the careless usage to which devices of the kind are very apt to be subjected. At the same time the device is of convenient form for carrying in the pocket and is also sightly in appearance.

Of course it is to be understood that the invention is not limited to the embodiment herein specifically described, but may be embodied in various forms without departure from its proper scope as defined by the appended claims I What I claim is .1.--In an apparatus for aiding the hearing,-

the .eombination offa telephonic transmitter, a pair of metal strips mounted on the.back of the transmitter and constituting the electrical terminals thereof for connection with a source of current, binding devices carried by the transmitter? for connectingin circuit therewith the conductors of a receiver, and means carried by one of the said transmitter terminals for clamping such conductors in fixed relation to the transmitter independently of the said binding devices.

2. In an apparatus for aiding the hearing, the combination of a telephonic transmitter,

tery, including a pair of terminals one of es -means for connecting the same with a bat-:

which is electrically connected with the transmitter casing and the other insulated therefrom, and a pair of blndlng devices extending through the back of the transmitter and insulated therefrom, and provided with binding screws for connecting to the trans mitter the conductors of a receiver, one of said-binding device's beingelectrically connected with the transmitter electrode andi the other with the insulated transmitterterminal.

3. In an apparatus'for aiding the-hearing,

the combination ofa telephonic. transmitter,

means for connecting the same with and supporting it upon a'battery, and means for connecting the transmitter with arecerver, comprising binding devices hermetically sealed in the wall of the transmitter casing and provided wlth binding screws outside of the casing for securing the conductors of the receiver.

EUGENE H- SQHNEIDER. I" lVitnesses: Rose M. MGGAHEY, MARY E. MAGEE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,-

Washington, D. G. 

